If the two signals are not encoded identically, there should be an
interesting signal when one of the transmitters is off and the other is on.
Has anybody looked for that sort of pattern?
Is there a map of the dead spots? Any time-nuts live in/near one?
Yes. Here is a screenshot of roughly equal strength JJY and WWVB as received in New Zealand around 10 PM local time on a KiwiSDR.
Due to the timing reversal of the pulses from each station this results in solid carrier during the data bit times (no matter the bit combination: 00, 01, 10, 11) as the signals are added. The marker pulses every 10 seconds give a 0.6 sec gap when both stations are at reduced-carrier. And the double marker at the minute boundary gives a 1.6 sec gap with a 0.4 sec pulse in the middle. I thought this was sort of amusing.
> Hal Murray wrote:
> If the two signals are not encoded identically, there should be an
> interesting signal when one of the transmitters is off and the other is on.
> Has anybody looked for that sort of pattern?
> Is there a map of the dead spots? Any time-nuts live in/near one?
Yes. Here is a screenshot of roughly equal strength JJY and WWVB as received in New Zealand around 10 PM local time on a KiwiSDR.
Due to the timing reversal of the pulses from each station this results in solid carrier during the data bit times (no matter the bit combination: 00, 01, 10, 11) as the signals are added. The marker pulses every 10 seconds give a 0.6 sec gap when both stations are at reduced-carrier. And the double marker at the minute boundary gives a 1.6 sec gap with a 0.4 sec pulse in the middle. I thought this was sort of amusing.
